22.5 Statistical Process Control
Control Charts • Central Line • Range • Upper and Lower Control Limits • Chart • R Chart • p Chart
One of the most important uses of statistics in industry is Statistical Process Control (SPC), which is used to maintain and improve product quality. Samples are tested during the production at specified intervals to determine whether the production process needs adjustment to meet quality requirements.
A particular industrial process is considered to be in control if it is stable and predictable, and sample measurements fall within upper and lower control limits. The process ...
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